广西苍梧县社垌钨多金属矿床中辉钼矿年龄及其地质意义  

The molybdenite mineralization age of Shedong tungsten polymetallic depositin Changwu County of Guangxi and its geological significance

作　　者：吴雄兵 彭火坤 赵久军 WU Xiongbing;PENG Huokun;ZHAO Jiujun(Geophysical Exploration Team,Sichuan Beauru of Geology&Mineral Resources Exploration and Development,Chengdu 610072,Sichuan,China)

机构地区：[1]四川省地质矿产勘查开发局物探队,四川成都610072

出　　处：《矿产与地质》2020年第1期71-75,共5页Mineral Resources and Geology

基　　金：新疆维吾尔自治区地质勘查基金项目管理中心“新疆西昆仑泉水沟一带1∶5万J45E022001、J45E022002、J45E023001、J45E023002四幅区域地质调查”(编号:K16-1-LQ01)资助。

摘　　要：社垌钨多金属矿床位于广西大瑶山地区,由平头背钨钼矿段、社山钨钼矿段及宝山铜矿段三部分组成。通过系统采集3个矿段中的辉钼矿,并进行精确的辉钼矿Re-Os年代学研究,发现平头背、社山钨钼矿化形成于439~437 Ma,与早古生代花岗闪长(斑)岩有关,其形成于后碰撞伸展的环境下;宝山铜矿化形成于102~93 Ma,与燕山晚期的石英斑岩有关,其形成于陆内拉张环境下。多期构造-岩浆作用相互叠加的部位,是找矿的有利空间。Shedong W-plogymetallic deposit is located at the Dayaoshan area and consists of Pingtoubei W-Mo ore-segment,Sheshan W-Mo ore-segment and Baoshan Cu ore-segment.The molybdenite samples in Pingtoubei,Sheshan and Baoshan ore segments are collected to carry out the accurate Re-Os isotopic dating study.The result shows that W-Mo mineralization at Pingtoubei and Sheshan ore segments are formed at 439–437 Ma,related with the early Paleozoic granodiorite(porphyry)at post-collision extension setting.The Baoshan Cu mineralization is formed at 102–93 Ma,related with the late Yanshanian quartz monzonite porphyry in the intracontinental extensional environment.The superimposed area of multiple tectonic-magmatic stages is the beneficial space to the mineral exploration.

关 键 词：社垌钨多金属矿 RE-OS定年 两期成矿作用 东大瑶山 

分 类 号：P578.291[天文地球—矿物学] P618.67[天文地球—地质学]